Selvage trimmer



Sept, 158 31923. LQ

E. D. PUTT SELVAGE TRIMMER Filed Oct. 22 1919V 5 Sheets-Sheet 2 Sepa. is, 1923. Y @www E. D. PUTT sELvAGE TRIMMER Filed Oct. 22 1919 5 Sheets-Sheet 5 Sept 18 E923.

` n E. D. PuTT y SELVAGE TRIMMER Filed OCL. 22 1919 5 Sheets-Sheet 4 Sept; 1s, w23. www@ E. D. PUTT SELVAGE TRIMMER Filed, Oct. 22 1919 `5 SheetS-Sheeil 5 ll IIVII ,.5

Patented Sept. 18, 1923.

smres intatte EDWM D. PUTT, F AKRON, OHIO, ASSIGNORYTO THE' FIR-ESTONIE TIRE BER COMPANY, 0F AKRON, OHIO, A CORPORATION OF OHIO.

ANI) -R'UB- SELVAGE TBIMER.

.Application filed October 22, 1919. Serial No. 332,463.

To all whom, it may concern:

Be it knownthatilL'EDwARD D. PUTT, a citizen ofthe United States, residing at Akron, in the county of Summit, State of Ohio, have invented certainv new and useful Improvements in Selvage Trimmers, of 'which the following is a`specification.

This invention relates to mechanism for trimming or cutting away the salvage edge from a moving strip' of fabric. It is designed particularly for use in factories where automobile tires are manufactured, and is intended to remove a narrow margin from the edges of rubberized fabric. In the manufacture of tires from fabric, it isA necessary to remove the selvage edge by hand. Machines have been designed to take the place of the hand operations and it is my purpose to improve on such machines and trim the fabric more accurately and easily without cumbersome or complicated machinery. The diiiculty which has been encountered heretofore has been in the perfection of a device for guiding the knife along the moving edge of the fabric so that it will always trim oi a selva-ge of even thickness notwithstanding the fact that the odge of the fabric is constantly shifting due to variations in the width and unevenncss in winding.

'Ihe machine shown herein is designed for attachment to a fabric winding mechanism in which the fabricl is wound up as received from a calender, but it may be used in other places -if desired. Other changes may be made'in specific embodiments of the invention and such as are within the scope thereof are intended to be covered by this application.

l In the drawings:

Fig. 1 is a side; elevation of a machine embodying this invention. A

Fig. 2 is a longitudinal vertical section through the machine.

Fig. 3 is an enlarged elevation of the' described herein as that patent.

The machine is duplicatedl on either side o f the fabric and both edges are trimmed simultaneously, but only one half of' the machine will Ybe described as the two sides are alike.

In the drawings 1 representsthe -frame of the machine, and 2 a base on which is secured a motor 3, the shaft of which drives a transverse shaft 4 which in turn drives a shaft 5 carrying a pulley 6. At one side of the frame is supported a pair of brackets 7 in which is received the shaft of the fabric roll 8, any suitable means being rovided for mounting the shaft. Any we l-known means may be provided for coupling the shaft with a pulley 9 by which the shaft is rotated through a belt 10-to wind upthe rubberized fabric. On a pair of brackets 1l below the brackets 7 is carried a roll of liner fabric 12 which is wound up with the rubberized fabric. From the upper side of the frame 1 extend a pair of vertical standards 13 in the upper ends of which is located a rotating shaft 14 from which is suspended a framework or hanger, designated generally by the numeral 15, .being pivotedat16 to a slidable cross head 17.- At 18. is provided a hand wheel for adjusting the distance between the twoframeworks on either they are fully shown in side of the machine, as described in the patv ent to Stevens aforementioned. v v

'Ihe fabric is designated by the numeral 19 and passes first under a tension roll 20 held in the ends of arms 21, pivoted to the frame at 22, the weight of the roller and arm serving to take up any slack in the fabric as it enters the selvage trimmer. It then passes over two rollers 23 and l24 mounted to rotate in brackets 23a and 24a in the upper side of the framework at either side ofthe uprights 13, and thence to the wind up roll or cylinder 8.

The shaft 25 of the roller 24 carries a ioo A sprocket 26 over which travels a sprocket chain 27 driving a second sprocket 28.which through intermediate connections drives 'a chain 29. A take up roller 30 may be provided to tighten the chain 27.

The lower end of the swinging frame '15 is provided with a channel-shaped frame 3l in the arms of which are threaded bolts 32 held by lock nuts 33. rIhe ends of the bolts are pointed toward each other and rounded 'to form bearings for a cutter head 34,

which is provided at about its midway point with a plate 35, against which are adjusted set screws 36, this arrangement being to pro- 5 vide for an initial adjustment of the cutter head with respect to the frame 34. In the frame 31 are supported two horizontal stub shafts 37 and 38, one of which carries a sprocket 39 over which passes the chain 29. The two shafts are provided with intermeshing gears 40, so -that the movement of the fabric overthe roll 24 will rotate the shafts and through them the knives 41. and 42 which are mounted in the outer ends thereof and overlap to trim 0H the selvage.

ln order to cause the swinging frame to move in and out to follow the deviations of the fabric edge, use is made of a feeler or detector which contacts the edge of the fabric a short distance before it enters the knives and which serves to move the frame to correspond with the movement of the fabric edge. This mechanism comprises a T-shaped frame 43,pivotally mounted on the pointed ends 44 of a pair of opposed bolts 45, threaded in brackets 46, secured to the frame 34 and held by lock nuts 47. The frame 43 is formed of a vertical arm 432l and a horizontal arm 43b pivotally connected with it and mounted to swing freely about the points 44 and the long arm is constantly urged toward the fabric by a light coil spring 48 attached to a plate 49 on the frame 31. The free end of the frame 43 carries a metallic feeler or tracker 50, fastened at one end to the frame, as at 51, and at the other formed with a broad flat surface 52 which bears against the edge of the fabric as it passes over the roller 23. A small set screw 53 serves to adjust the location of the feeler or detector with respect to the frame.

' In line with the pivots 44 the frame 43 is provided with a roller 54, the surface of which is roughened or knurled and is arranged to bear against the upper surface of the fabric. On a lug 55 projecting downwardly from the frame 43 is pivoted an arm 56, the outer end of which carries a second knurled roller 57 located below the roller 54. A spring 58 serves to urge the arm 56 upwardly to press the fabric between the rollers 54 and 57.

The operation of the parts just described, by which the frame is rocked about its pivot to cause the knife to follow the deviation of the moving fabric edge is as follows:

The feeler or detector 52 is held in Contact with the fabric edge by the spring 48, serving to rock the frame 43 about the pivots 44. Any deviation of the fabric edge from a straight line causes the frame 43 to move correspondingly. This serves to change the direction of the axes of the rollers 54 and 57 which are normally at right angles to the line of travel of the fabric and as they bear against the fabric, they will tend to roll in or out and cause an inward or outward movement of the swinging frame 15, which in turn moves the knives the correct amount to maintain an even trim. Looking at Fig. 4, suppose, for example, that the fabric edge moves outwardly, this will cause the axes of the rollers 54 and 57 to turn to the left. The rotation of the rollers will tend to move them off of the fabric and cause the` frame to move outwardly. When the frame has moved outwardly enough to bring the knives at the proper distance from the center of the fabric, the framework `rights itself. An inward movement of the fabric edge is detected by feeler 52 and a turning of the frame 43 causes the rollers to roll inwardly on the fabric, moving the frame correspondingly. The amount of trim is determined by lthe adjustment of the feeler relative to the line of the knives, this adjustment being obtained by means of the set screw 53.

The trimmed selvage is designated by the numeral 59 and is removed from the main body of the fabric by a pair of selvage pulling rollers rotatably mounted on an arm 60 suspended from the frame 1. One of these rollers 61 is mounted on a shaft 62 rotatably mounted in the arm 60, the end of the shaft.

carrying a pulley 63 driven by a belt G4 from a pulley 65 on the motor shaft. The other roller bears the numeral 66 and is rotatably mounted on a swinging arm 67 pivoted on the end of arm 60. A bolt 68 is passed through the arm 67 and is surrounded by a spring 69 confined by a nut 70. This spring serves to force together the rollers 61 and 66. At the inner end, the rollers are formed with intermeshing gear teeth 71 whereby lthe rotation of the roller 61 is transmitted to the roller 66,."` The drive mechanism for the rollers is so proportioned that they rotate at a higher rate of speed than the speed of the fabric-,and thus exeroise a constant drag onthe selvage. This action tends not only to positively remove the selvage after it is cut, but assists the knives in cutting the fabric. Doctors or Scrapers 72 are carried on the arm 67 and bear on the rollers and remove any of the j selvage that tends to stick to them. A pair of guides 74 are mounted above the rollers and serve to guide the fabric into the rollers fil-66.'

It is believed that no further description of the operation of the apparatus will-be necessary than that given above. By means of .this device the selvage is trimmed off from the. fabric in a strip of even width throughout and the knives quickly and accurately follow any deviation or meanderings, of the fabric edge. While the description has been quite specific and detailed, it will be understood that the details are non essential and the broad principles of the invention may be embodied in different forms. Such changes and modifications as may fall Within the scope of the invention are included within the meaning of the appended claims.

I claim:

1. In a machine for trimming selvage from a moving strip of fabric, a movable knife carrying frame, a knife on said frame, a tracker contacting the edge of the fabric in front of the knife, and means operated by the tracker to cause movement of the frame to correspond to the lateral movement of the fabric edge, said means comprising. a pivoted frame, a roller on said frame contacting the surface of the fabric and connections from the trackers to the frame whereby the angular relation of the roller relative to the knife is changed by movement of the tracker.

2. In a machine for trimming selvage from a moving strip of fabric, a movable knife carrying frame, a knife on said frame, a roller contacting the surface of the fabric also carried on said frame, and means to change the direction of the axis of said roller relative to the knife, said means being operated by shifting of the fabric edge. j

3. In a machine for trimming selvage from a moving strip of fabric, a knife movable laterally of the fabric, a roller connected with said knife and rolling on the surface of the fabric, the axis of said roller be- I ing normally at right angles to the line of ing having a fixed travel 'of the fabric and means controlled by the fabric edge for shifting' the axis of the roller relative to said knife.

4. In a machine for trimming selvage from a moving stripof fabric, a knife movable laterally of the fabric, a pivoted frame, a roller in said frame, the roller bearing on the surface of the fabric, and means adapted to move the roller relative to the knife said means being controlled by shifting of the fabric edge to move the frame about itis pivot.

5. A machine for trimming the selvage from moving strip of fabric comprising, a frame mounted for adjustment laterally of the strip, a fabric en aging roller mounted upon the frame for a justment with respect thereto, a cutter element mounted upon the frame to operate in rear of the roller and a .tracker adapted to adjust the roller through engagement with the edge of the 4strip.

6. A machine for trimming selvage from a moving strip. of fabric comprising, a mounting adapted for adjustment laterally of the strip, a rotary cutter upon the mountaxis of rotation, a roller carrying frame, a secon vupon the mounting having an adjustable axis of rotation said yroller bearing on the named frame,'a pair of rollers in said fsec- V ond frame, the fabric passing between said rollers and a tracker on the second frame adapted to be moved by deviations of the fabric edge.

8. A machine for trimming selvage from moving fabric, comprising a movable knife frame connected with the first named frame, a pair-of 4rollers in the second frame, means for pressing said rollers together, said second frame being mounted so that the direction of the rollers may be changed and a tracker connected with the second frame and yieldingly held against the fabric edge.

9. A machine for trimming selvage from a moving strip of fabric comprising, a hanger adapted for adjustment laterally of the stri a. cutter element thereon, rollers mounte upon the-hanger for simultaneous adjustment thereon independently of the cutter said rollers bearing upon opposite faces of the strip, and a tracker connected to the rollers and engaging the edge of the stri 1(1)). A machine for trimming selvage from fabric comprising means for cutting the selvage from the fabric, on the surface of the fabric pivotally connected with the cutting means and a member contacting the edge of the fabric and connected with the rolling means to change the direction thereof.

11. A machine for trimming the selvage from a moving strip of fabric com rising, a movable hanger, a cutter element t ereon, and means adapted to move the hanger laterally of the strip through engagement with the surface and edge of the moving strip said means being constructed for adjustment relative to the hanger and the cutter element through sinuosities in the edge of said moving strip.

12. A machine for trimming the selvage from a moving strip of fabric comprising, a cutter, and a mounting therefor adapted for adjustment through movement of the strip, to direct the cutter in arallelism with the edge outline thereof sai mounting embodying devices arranged to deflect the cut- -ter from the line of travel of the strip the cutter.

EDWARD D. PUTT.`

a device for rolling 

